I have just whooped Ghetsis and I passed Giant Chasm after looking for kyurem everywhere. I have decided that Kyurem is too noobish for me and went to victory road. Do I have to beat the Pokemon league to get kyurem to show? If so, if you give me a walkthrough link of victory road then I will upvote and best-answer you :>...and maybe you can give me a walkthrough of finding kyurem in the giant chasm

Black Kyurem/White Kyurem cannot be captured because Ghetsis's "staff" when you first encounter it but when you recieve N's Zekrom (Black 2)/Reshiram (White 2), you can come back to the Giant Chasm and battle it again. When you come back, it will be at Lv. 70 in it's normal form and to become Black Kyurem/White Kyurem, it will need to be combined with Zekrom/Reshiram by using an item called the DNA Link Pin.